<template>
  <div class="app-container">
    <div :class="['filter-container','open']">

      <!-- 展开状态下的筛选框 -->
      <el-form ref="form" :inline="true" :model="form" label-width="60px">
        <el-form-item label="标题">
          <el-input v-model="form.title" style="width: 130px;" />
        </el-form-item>
        <el-form-item label="Imp">
          <!-- <el-input v-model="form.importance" style="width: 160px;"></el-input> -->
          <el-select v-model="form.importance" placeholder="Imp" clearable style="width: 130px">
            <el-option v-for="item in importanceOptions" :key="item" :label="item" :value="item" />
          </el-select>
        </el-form-item>
        <el-form-item label="类型">
          <!-- <el-input v-model="form.type" style="width: 160px;"></el-input> -->
          <el-select v-model="form.type" placeholder="类型" clearable style="width: 130px">
            <el-option
              v-for="item in calendarTypeOptions"
              :key="item.key"
              :label="item.display_name+'('+item.key+')'"
              :value="item.key"
            />
          </el-select>
        </el-form-item>
        <el-form-item label="标题">
          <!-- <el-input v-model="form.sort" style="width: 160px;"></el-input> -->
          <el-select v-model="form.sort" style="width: 130px" @change="handleFilter">
            <el-option v-for="item in sortOptions" :key="item.key" :label="item.label" :value="item.key" />
          </el-select>
        </el-form-item>
        <el-form-item label="标题">
          <!-- <el-input v-model="form.sort" style="width: 160px;"></el-input> -->
          <el-select v-model="form.sort" style="width: 130px" @change="handleFilter">
            <el-option v-for="item in sortOptions" :key="item.key" :label="item.label" :value="item.key" />
          </el-select>
        </el-form-item>
        <el-form-item label="标题">
          <!-- <el-input v-model="form.sort" style="width: 160px;"></el-input> -->
          <el-select v-model="form.sort" style="width: 130px" @change="handleFilter">
            <el-option v-for="item in sortOptions" :key="item.key" :label="item.label" :value="item.key" />
          </el-select>
        </el-form-item>
        <el-form-item label="标题">
          <!-- <el-input v-model="form.sort" style="width: 160px;"></el-input> -->
          <el-select v-model="form.sort" style="width: 130px" @change="handleFilter">
            <el-option v-for="item in sortOptions" :key="item.key" :label="item.label" :value="item.key" />
          </el-select>
        </el-form-item>
        <el-form-item label="标题">
          <!-- <el-input v-model="form.sort" style="width: 160px;"></el-input> -->
          <el-select v-model="form.sort" style="width: 130px" @change="handleFilter">
            <el-option v-for="item in sortOptions" :key="item.key" :label="item.label" :value="item.key" />
          </el-select>
        </el-form-item>
        <el-form-item label="标题">
          <!-- <el-input v-model="form.sort" style="width: 160px;"></el-input> -->
          <el-select v-model="form.sort" style="width: 130px" @change="handleFilter">
            <el-option v-for="item in sortOptions" :key="item.key" :label="item.label" :value="item.key" />
          </el-select>
        </el-form-item>
        <el-form-item label="标题">
          <!-- <el-input v-model="form.sort" style="width: 160px;"></el-input> -->
          <el-select v-model="form.sort" style="width: 130px" @change="handleFilter">
            <el-option v-for="item in sortOptions" :key="item.key" :label="item.label" :value="item.key" />
          </el-select>
        </el-form-item>
        <el-form-item label="标题">
          <!-- <el-input v-model="form.sort" style="width: 160px;"></el-input> -->
          <el-select v-model="form.sort" style="width: 130px" @change="handleFilter">
            <el-option v-for="item in sortOptions" :key="item.key" :label="item.label" :value="item.key" />
          </el-select>
        </el-form-item>
        <el-form-item label="标题">
          <!-- <el-input v-model="form.sort" style="width: 160px;"></el-input> -->
          <el-select v-model="form.sort" style="width: 130px" @change="handleFilter">
            <el-option v-for="item in sortOptions" :key="item.key" :label="item.label" :value="item.key" />
          </el-select>
        </el-form-item>
        <el-form-item label="标题">
          <!-- <el-input v-model="form.sort" style="width: 160px;"></el-input> -->
          <el-select v-model="form.sort" style="width: 130px" @change="handleFilter">
            <el-option v-for="item in sortOptions" :key="item.key" :label="item.label" :value="item.key" />
          </el-select>
        </el-form-item>
      </el-form>
      <div class="filter-button">
        <el-button v-waves class="filter-item" type="primary" icon="el-icon-search" @click="handleFilter">
          搜索
        </el-button>
        <el-button class="filter-item" style="margin-left: 10px;" type="primary" icon="el-icon-edit" @click="handleCreate">
          新增
        </el-button>
        <el-button
          v-waves
          :loading="downloadLoading"
          class="filter-item"
          type="primary"
          icon="el-icon-download"
          @click="handleDownload"
        >
          导出
        </el-button>
      </div>

    </div>

    <div :class="['table','open']">
      <div class="table-container">
        <el-table
          :key="tableKey"
          v-loading="listLoading"
          height="100%"
          :data="list"
          border
          fit
          highlight-current-row
          style="width: 100%;"
          @sort-change="sortChange"
        >
          <el-table-column label="ID" prop="id" sortable="custom" align="center" width="80" :class-name="getSortClass('id')">
            <template slot-scope="{row}">
              <span>{{ row.id }}</span>
            </template>
          </el-table-column>
          <el-table-column label="日期" width="150px" align="center">
            <template slot-scope="{row}">
              <span>{{ row.timestamp | parseTime('{y}-{m}-{d} {h}:{i}') }}</span>
            </template>
          </el-table-column>
          <el-table-column label="标题" min-width="150px">
            <template slot-scope="{row}">
              <span class="link-type" @click="handleUpdate(row)">{{ row.title }}</span>
              <el-tag>{{ row.type | typeFilter }}</el-tag>
            </template>
          </el-table-column>
          <el-table-column label="作者" width="110px" align="center">
            <template slot-scope="{row}">
              <span>{{ row.author }}</span>
            </template>
          </el-table-column>
          <el-table-column label="Imp" width="80px">
            <template slot-scope="{row}">
              <svg-icon v-for="n in + row.importance" :key="n" icon-class="star" class="meta-item__icon" />
            </template>
          </el-table-column>
          <!-- <el-table-column label="阅读量" align="center" width="95">
                            <template slot-scope="{row}">
                                <span v-if="row.pageviews" class="link-type"
                                    @click="handleFetchPv(row.pageviews)">{{ row.pageviews }}</span>
                                <span v-else>0</span>
                            </template>
                        </el-table-column> -->
          <el-table-column label="状态" class-name="status-col" width="100">
            <template slot-scope="{row}">
              <el-tag :type="row.status | statusFilter">
                {{ row.status }}
              </el-tag>
            </template>
          </el-table-column>
          <el-table-column label="操作" align="center" width="230" class-name="small-padding fixed-width">
            <template slot-scope="{row,$index}">
              <el-button type="primary" size="mini" @click="handleUpdate(row)">
                编辑
              </el-button>
              <el-button
                v-if="row.status!='published'"
                size="mini"
                type="success"
                @click="handleModifyStatus(row,'published')"
              >
                发布
              </el-button>
              <el-button v-if="row.status!='draft'" size="mini" @click="handleModifyStatus(row,'draft')">
                选中
              </el-button>
              <el-button v-if="row.status!='deleted'" size="mini" type="danger" @click="handleDelete(row,$index)">
                删除
              </el-button>
            </template>
          </el-table-column>
        </el-table>
      </div>
    </div>

    <pagination v-show="total>0" :total="total" :page.sync="listQuery.page" :limit.sync="listQuery.limit" @pagination="getList" />

    <el-dialog :title="textMap[dialogStatus]" :visible.sync="dialogFormVisible">
      <el-form
        ref="dataForm"
        :rules="rules"
        :model="temp"
        label-position="left"
        label-width="70px"
        style="width: 400px; margin-left:50px;"
      >
        <el-form-item label="Type" prop="type">
          <el-select v-model="temp.type" class="filter-item" placeholder="Please select">
            <el-option v-for="item in calendarTypeOptions" :key="item.key" :label="item.display_name" :value="item.key" />
          </el-select>
        </el-form-item>
        <el-form-item label="Date" prop="timestamp">
          <el-date-picker v-model="temp.timestamp" type="datetime" placeholder="Please pick a date" />
        </el-form-item>
        <el-form-item label="Title" prop="title">
          <el-input v-model="temp.title" />
        </el-form-item>
        <el-form-item label="Status">
          <el-select v-model="temp.status" class="filter-item" placeholder="Please select">
            <el-option v-for="item in statusOptions" :key="item" :label="item" :value="item" />
          </el-select>
        </el-form-item>
        <el-form-item label="Imp">
          <el-rate v-model="temp.importance" :colors="['#99A9BF', '#F7BA2A', '#FF9900']" :max="3" style="margin-top:8px;" />
        </el-form-item>
        <el-form-item label="Remark">
          <el-input v-model="temp.remark" :autosize="{ minRows: 2, maxRows: 4}" type="textarea" placeholder="Please input" />
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogFormVisible = false">
          取消
        </el-button>
        <el-button type="primary" @click="dialogStatus==='create'?createData():updateData()">
          确认
        </el-button>
      </div>
    </el-dialog>

    <!-- //阅读量弹框  -->
    <!-- <el-dialog :visible.sync="dialogPvVisible" title="读取数据">
            <el-table :data="pvData" border fit highlight-current-row style="width: 100%">
                <el-table-column prop="key" label="Channel" />
                <el-table-column prop="pv" label="Pv" />
            </el-table>
            <span slot="footer" class="dialog-footer">
                <el-button type="primary" @click="dialogPvVisible = false">Confirm</el-button>
            </span>
        </el-dialog> -->

  </div>
</template>

<script>
import { fetchList, createArticle, updateArticle } from '@/api/article'
import waves from '@/directive/waves' // waves directive
import { parseTime } from '@/utils'
import Pagination from '@/components/Pagination' // secondary package based on el-pagination 分页组件

const calendarTypeOptions = [
  { key: 'CN', display_name: 'China' },
  { key: 'US', display_name: 'USA' },
  { key: 'JP', display_name: 'Japan' },
  { key: 'EU', display_name: 'Eurozone' }
]

// arr to obj, such as { CN : "China", US : "USA" }
const calendarTypeKeyValue = calendarTypeOptions.reduce((acc, cur) => {
  acc[cur.key] = cur.display_name
  return acc
}, {})

export default {
  name: 'LayoutTable',
  components: { Pagination },
  directives: { waves }, // 指令
  // 过滤 {{row.status | statusFilte}}
  // html代码中，{{}}中实现filters顺序是 {{参数 | filters函数 | filters函数 | ...}}
  // 后面可以多个filters函数，前面filters函数return的结果是后面filters函数的参数。
  // 并且可以在过滤函数后面加上（）里面加上其他的参数。如 filterTwo('同学')
  filters: {
    statusFilter(status) {
      const statusMap = {
        published: 'success',
        draft: 'info',
        deleted: 'danger'
      }
      return statusMap[status]
    },
    typeFilter(type) {
      return calendarTypeKeyValue[type]
    }
  },
  data() {
    return {
      // 筛选框的 form 表单
      form: {
        importance: undefined,
        title: undefined,
        type: undefined,
        sort: '+id'
      },
      rules: { // 表单验证
        type: [{ required: true, message: 'type is required', trigger: 'change' }],
        timestamp: [{ type: 'date', required: true, message: 'timestamp is required', trigger: 'change' }],
        title: [{ required: true, message: 'title is required', trigger: 'blur' }]
      },
      tableKey: 0,
      list: null, // 表格数据
      total: 0, // 总条数
      listLoading: true, // 表格加载数据时的 loading
      listQuery: { // 表格当前页 和 当前页的展示数量

        page: 1,
        limit: 20
      },
      importanceOptions: [1, 2, 3], // imp 的下拉选项
      calendarTypeOptions, // 类型的下拉选内容
      sortOptions: [{ label: 'ID Ascending', key: '+id' }, { label: 'ID Descending', key: '-id' }], // 标题的下拉选
      statusOptions: ['published', 'draft', 'deleted'], // 新增和修改弹框里面的 Status 下拉框
      temp: { // 新增和修改弹框 的 form 表单
        id: undefined,
        importance: 1,
        remark: '',
        timestamp: new Date(),
        title: '',
        type: '',
        status: 'published'
      },
      dialogFormVisible: false, // 弹框展示隐藏
      dialogStatus: '', // 弹框新增或者修改
      textMap: { // 弹框的标题
        update: '编辑',
        create: '新增'
      },
      // dialogPvVisible: false, //阅读量弹框
      // pvData: [], //阅读量弹框里面的表格数据
      downloadLoading: false // 导出按钮 的 loading
    }
  },
  created() {
    this.getList()
  },
  methods: {
    // 获取表格数据
    getList() {
      this.listLoading = true
      fetchList(this.listQuery).then(response => {
        this.list = response.data.items
        this.total = response.data.total
        // Just to simulate the time of the request
        setTimeout(() => {
          this.listLoading = false
        }, 1.5 * 1000)
      })
    },
    // 重新获取表格数据 页码归为1
    handleFilter() {
      this.listQuery.page = 1
      this.getList()
    },
    // 选中 与 发布 切换
    handleModifyStatus(row, status) {
      this.$message({
        message: '操作Success',
        type: 'success'
      })
      row.status = status
    },
    // 排序
    sortChange(data) {
      console.log(data)
      const { prop, order } = data
      if (prop === 'id') {
        this.sortByID(order)
      }
    },
    sortByID(order) {
      if (order === 'ascending') {
        this.listQuery.sort = '+id'
      } else {
        this.listQuery.sort = '-id'
      }
      // 想参数中添加 排序方式后 再次向后台请求
      this.handleFilter()
    },
    // 新增数据-打开清空表单数据
    resetTemp() {
      this.temp = {
        id: undefined,
        importance: 1,
        remark: '',
        timestamp: new Date(),
        title: '',
        status: 'published',
        type: ''
      }
    },
    // 新增数据-打开弹框
    handleCreate() {
      this.resetTemp()
      this.dialogStatus = 'create'
      this.dialogFormVisible = true
      this.$nextTick(() => {
        this.$refs['dataForm'].clearValidate()
      })
    },
    // 新增数据-表单提交
    createData() {
      this.$refs['dataForm'].validate((valid) => {
        if (valid) {
          this.temp.id = parseInt(Math.random() * 100) + 1024 // mock a id
          this.temp.author = 'vue-element-admin'
          createArticle(this.temp).then(() => {
            this.list.unshift(this.temp)
            this.dialogFormVisible = false
            this.$notify({
              title: 'Success',
              message: 'Created Successfully',
              type: 'success',
              duration: 2000
            })
          })
        }
      })
    },
    // 修改 -- 打开弹框
    handleUpdate(row) {
      this.temp = Object.assign({}, row) // 拷贝对象
      this.temp.timestamp = new Date(this.temp.timestamp)
      this.dialogStatus = 'update'
      this.dialogFormVisible = true
      this.$nextTick(() => {
        this.$refs['dataForm'].clearValidate()
      })
    },
    // 修改 -- 提交表单
    updateData() {
      this.$refs['dataForm'].validate((valid) => {
        if (valid) {
          const tempData = Object.assign({}, this.temp)
          tempData.timestamp = +new Date(tempData.timestamp) // change Thu Nov 30 2017 16:41:05 GMT+0800 (CST) to 1512031311464
          updateArticle(tempData).then(() => {
            const index = this.list.findIndex(v => v.id === this.temp.id)
            this.list.splice(index, 1, this.temp)
            this.dialogFormVisible = false
            this.$notify({
              title: 'Success',
              message: 'Update Successfully',
              type: 'success',
              duration: 2000
            })
          })
        }
      })
    },
    // 删除数据
    handleDelete(row, index) {
      this.$notify({
        title: 'Success',
        message: 'Delete Successfully',
        type: 'success',
        duration: 2000
      })
      this.list.splice(index, 1)
    },
    // 导出 表格数据
    handleDownload() {
      this.downloadLoading = true
      // 调用 Excel 导出表格的工具
      import('@/vendor/Export2Excel').then(excel => {
        const tHeader = ['timestamp', 'title', 'type', 'importance', 'status']
        const filterVal = ['timestamp', 'title', 'type', 'importance', 'status']
        const data = this.formatJson(filterVal)
        excel.export_json_to_excel({
          header: tHeader,
          data,
          filename: 'table-list'
        })
        this.downloadLoading = false
      })
    },
    // 获取导出表格的数据
    formatJson(filterVal) {
      return this.list.map(v => filterVal.map(j => {
        if (j === 'timestamp') {
          return parseTime(v[j])
        } else {
          return v[j]
        }
      }))
    },
    getSortClass: function(key) {
      const sort = this.listQuery.sort
      return sort === `+${key}` ? 'ascending' : 'descending'
    }
  }
}
</script>
<style lang="scss" scoped>
//表格布局的注释：
//$rowLength 这个变量表示了 筛选的搜索框会有多少行，由于在不同宽度显示器下 所占行数会不一定 ，所以下面使用媒体查询 做兼容
//最小兼容至 1366
@import '~@/styles/layout-table.scss';
$rowLength: 2;
@media all and (min-width: 1659px) {
    $rowLength: 2;
    @include calculation($rowLength: $rowLength);
}
@media all and (max-width: 1659px) {
    $rowLength: 3;
    @include calculation($rowLength: $rowLength);
}
</style>
